/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.ambari.infra.solr.metrics.reporters;

import static org.apache.ambari.infra.solr.metrics.reporters.MetricsUtils.toTimelineMetric;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import org.apache.solr.metrics.SolrMetricManager;

public class AMSCacheReporter extends AMSReporter<Map<String, Number>> {

  private List<String> fields;

  public AMSCacheReporter(SolrMetricManager metricManager, String registryName) {
    super(metricManager, registryName);
  }

  public void setFields(String fields) {
    this.fields = Arrays.stream(fields.split(",")).map(String::trim).collect(Collectors.toList());
  }

  @Override
  protected GaugeConverter<Map<String, Number>> gaugeConverter() {
    return (metricName, gauge, currentMillis) -> fields.stream()
            .map(field -> toTimelineMetric(
                    String.format("%s.%s", metricName, field),
                    gauge.getValue().get(field).doubleValue(),
                    currentMillis))
            .collect(Collectors.toList());
  }
}
